The crossword solution for the term 'RUN A RISK' is BET, which is a three-letter word. Betting is an activity that involves taking a risk in order to gain a reward. It is often associated with gambling, where people wager money on the outcome of a game or event. Betting can also be done on other things such as stocks and sports teams. In any case, when someone bets, they are running a risk in the hopes of gaining something in return.